3A95.59 - Belousov - Zhabotinsky Reactions

Code Number:
3A95.59
Demo Title:
Belousov - Zhabotinsky Reactions
Condition:
Good
Principle:
Chaotic Patterns - Initial Conditions
Area of Study:
Chaos
Equipment:
Sodium Bromate, Malonic Acid, Potassium Bromide, Cerium (IV) Ammonium Nitrate, Sulfuric Acid, Ferroin Indicator, Distilled Water, Beakers, Petri Dishes, Stirring Rods.
Procedure:

See also 3A95.59 in Oscillations/Acoustics.

The mixing of chemicals needs to take place before hand.  This also take quite a bit of time, so make sure to allow at least 24 hours to get this demo ready.  Refer to the file for chemical proportions and mixing instructions.

For every 100 ml of solution use:

0.33g Malonic Acid
0.95g NaBrO3
0.55g Ceirc Ammonium Nitrate
4.5 ml H2SO4

**For the KBr make a stock solution using .2 grams KBr per Liter.  Use 1 ml of this solution for each 100 ml of reaction solution.

References:
  • Sergey V. Buldyrev, Melissa J. Erickson, Peter Garik, Linda S. Shore, H. Eugene Stanley, Edwin F. Taylor, Paul A. Trunfio, and Paul Hickman, "Science Research in the Classroom", TPT, Vol. 32, #7, Oct. 1994, p. 411.
  • Eugenie V. Mielczarek et al., "Chemical Clocks: Experimental and Theoretical Models of Nonlinear Behavior", AJP, Vol. 51, #1, Jan. 1983, p. 32.
  • Richard J. Fitzgerald, "Complex Patterns in Frustrated Synchronization", Physics Today, Vol. 69, #2, Feb. 2016, p. 18.
  • Johanna Miller, "A Nonbiological System Offers Insight Into Biological Synchronization", Physics Today, Vol. 62, #4, Apr. 2009, p. 14.
  • Charles Day, "Feedback Tames Chaotic Surface Chemistry", Physics Today, Vol. 54, #7, July, 2001, p. 18.
  • Irving R. Epstein, "Spiral Waves in Chemistry and Biology", Science, Vol. 252, #5002, Apr. 1991, p. 67.
  • Jearl Walker, "Chemical Systems That Oscillate Between One Color and Another", The Amateur Scientist, July 1978, p. 152 - 161.
  • Gene Gennaro and Bruce Munson, "The Iodine Clock Reaction and Hypothermia", The Science Teacher, Vol. 55, #9, Dec. 1988, p. 16 - 19.
  • Neil. A. Downie, "2. Glacial Oscillations", Ink Sandwiches, Electric Worms and 37 Other experiments for Saturday Science, p. 13 - 19.
  • A. Babloyantz, "The Belousov - Zhabotinski Reaction", Molecules, Dynamics, and Life, 1986, p. 155 - 172.
  • Earle S. Scott, Rodney Schreiner, Lee R. Sharpe, Bassam Z. Shakhashiri, and Glen E. Dirreen, "7.2 Cerium-Catalyzed Bromate-Malonic Acid Reaction", Chemical Demonstrations, Vol. 2, p. 257 - 261.
  • Earle S. Scott, Rodney Schreiner, Lee R. Sharpe, Bassam Z. Shakhashiri, and Glen E. Dirreen, "7. Oscillating Chemical Reactions", Chemical Demonstrations, Vol. 2, p. 232 - 247.




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